code: def test_validate_user_settings():
      """Test that the environment can validate the number of devices and nodes set in Fabric/Trainer."""
      env = TorchElasticEnvironment()
      env.validate_settings(num_devices=4, num_nodes=2)
      with pytest.raises(
          ValueError,
          match=re.escape(
              "the product (2 * 2) does not match the world size (8)"
          ),
      ):
          env.validate_settings(num_devices=2, num_nodes=2)
  
file_path: pytorch-lightning/tests/tests_fabric/plugins/environments/test_torchelastic.py
imports: import logging
  import os
  import re
  from unittest import mock
  import pytest
  from lightning.fabric.plugins.environments import TorchElasticEnvironment
label_desc: Use image node_id 4 for calling a global function with example usage: test_validate_user_settings() without return types